We Have Taken A Hit!!! I Need A MEDIC!!! (PICs)

Hello every one at RIU im still learning about this hobby and i have never really had too much trouble growing outdoors however trying my hand at indoors has presented me with this issue my plants all round seem unhealthy and are displaying odd signs (brownish-reddish color in the stems) it would be a great help if anyone can offer assistance.
The only thing i can think of is I am giving them too much water too much water or maybe drainage issues.

the soil is the the best organic mix my local nursery had. I have also being feeding with organic nutes and following instructions on label the ph is always measured after my water supply has sat for 24 hours with a air-stone, i then add nutes and test ph (usually between 6.5-6.
the plants were grown from bag seed and are exactly 73 days old set to 18/6 veg stage.
+rep for any help

They don't look too bad man. What issues are you having? They look like they don't have a ton of lateral branching but they really do look pretty healthy. What strain are they?

Hey man. They're actually looking very healthy for only using floros! You would have more branching if you use better light.
Don't worry about the stem coloration, most of the time it is genetic influences. By the look of some of the lower leaves I would hold back on a few feedings if I were you, just use plain ph'd water. Good job on using decent size pots!

thanks for the info
the only real oddities i have noticed was lower fan leaves have being turning completely yellow (they have being removed in pics) and i am only used to seeing this happen when flowing stage is reached or just in moderation but its happening to most of them. the other oddity is on one of my plants its growing mutated looking leaves (new growth) i will upload close up pics of what i mean in about an hour.

look its probably nothing to be concerned about its just there is soo much more that needs atention when growing indoor rather then outdoor and thus far have looved every little bit of it i am looking forward to the final product.

oh and as for what strain haha i have no idea there all just random bagseeds that i have collected over time and the plants you currently see are my pioneers eventually i will take clones then move them into the flowering stage to determine sex, quality, flavor, ect... and be left with only one strain one mother plant and of course one flowering of the best out of em all

lol my cam has shit itself so i will have to get back to you all with pics at a later stage